div form {
    background-color: darkcyan;
    border: bisque 1px solid;
}

div {
    background-color: burlywood;
}

.bookList {
    width: 1000px;
    margin: 20px auto;
    text-align: center
}
.top{
    background-color: red;
    height: 80px;

}
.b_left{
    background-color: blueviolet;
    float: left;
    width: 20%;
    height: 1300px;
}
.b_right{
    float: right;
    width: 80%;
    height:1300px;

}